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/********************* */
/*! \file sort_inference.h
** \verbatim
** Original author: Andrew Reynolds <andrew.j.reynolds@gmail.com>
** Major contributors: Morgan Deters <mdeters@cs.nyu.edu>
** Minor contributors (to current version): none
** This file is part of the CVC4 project.
** Copyright (c) 2009-2013 New York University and The University of Iowa
** See the file COPYING in the top-level source directory for licensing
** information.\endverbatim
**
** \brief Pre-process step for performing sort inference
**/
#include "cvc4_private.h"
#ifndef __CVC4__SORT_INFERENCE_H
#define __CVC4__SORT_INFERENCE_H
#include <iostream>
#include <string>
#include <vector>
#include <map>
#include "expr/node.h"
#include "expr/type_node.h"
namespace CVC4 {
class SortInference{
private:
//for debugging
//std::map< int, std::vector< Node > > d_type_eq_class;
private:
int sortCount;
std::map< int, int > d_type_union_find;
std::map< int, TypeNode > d_type_types;
std::map< TypeNode, int > d_id_for_types;
//for apply uf operators
std::map< Node, int > d_op_return_types;
std::map< Node, std::vector< int > > d_op_arg_types;
//for bound variables
std::map< Node, std::map< Node, int > > d_var_types;
//get representative
int getRepresentative( int t );
void setEqual( int t1, int t2 );
int getIdForType( TypeNode tn );
void printSort( const char* c, int t );
//process
int process( Node n, std::map< Node, Node >& var_bound );
private:
//mapping from old symbols to new symbols
std::map< Node, Node > d_symbol_map;
//mapping from constants to new symbols
std::map< TypeNode, std::map< Node, Node > > d_const_map;
//number of subtypes generated
std::map< TypeNode, int > d_subtype_count;
//helper functions for simplify
TypeNode getOrCreateTypeForId( int t, TypeNode pref );
TypeNode getTypeForId( int t );
Node getNewSymbol( Node old, TypeNode tn );
//simplify
Node simplify( Node n, std::map< Node, Node >& var_bound );
public:
SortInference() : sortCount( 0 ){}
~SortInference(){}
void simplify( std::vector< Node >& assertions, bool doRewrite = false );
int getSortId( Node n );
int getSortId( Node f, Node v );
//set that sk is the skolem variable of v for quantifier f
void setSkolemVar( Node f, Node v, Node sk );
};
}
#endif
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